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Volcanic Plumes and Vog, Hawaii: Image of the Day

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Volcanic Plumes and Vog, Hawaii: Image of the Day


Published ? 5/17/2008


For 25 years, Kilauea volcano on Hawai'i's Big Island has been erupting continuously. /NaturalHazards/view.php?id=19711 Recent explosive activity that started in March 2008 produced increased emissions of sulfur dioxide. These emissions result in a widespread caustic volcanic fog -- known as -- that, depending on local winds, drifts as much as 200 miles up the volcanic chain, burning throats and eyes and inducing asthma attacks as far away as Honolulu, on the island of Oahu.

An oblique view (the astronaut was looking towards the southwest, rather than straight down) of the Hawaiian Islands taken from the International Space Station on a hazy spring day includes a regional view of three volcanic plumes from Kilauea that contributed to the vog: the plume from Halema'uma'u crater near the summit (a), a plume from Pu'u O'o vent along the east rift (b), and a plume from where lava enters the ocean on the coast outside of the park boundaries (c). At the time this image was taken, doctors throughout the state of Hawaii were reporting an increased caseload of people with respiratory problems.

Aside from the vog, this image captures cloud formations that reveal the large-scale air flow and the local wind patterns around the islands. The parallel lines of clouds aligned roughly northeast to southwest indicate the direction of the region's prevailing trade winds. That flow is disrupted around the islands (between Hawai'i and Maui, image right), and it is further influenced by the local land-sea breeze, which at that time had driven the cloud formations offshore and caused them to circle the islands. In addition to the Kilauea plumes, the volcanoes of Mauna Loa and Mauna Kea are also visible on the island of Hawai'i (image center). The uninhabited island of Kaho'olawe is just visible to the southwest of Maui.

Astronaut photograph eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS017&roll=E&frame=7156 ISS017-E-7156 was acquired May 17, 2008, with a Kodak 760C digital camera using a 50 mm lens, and is provided by the ISS Crew Earth Observations experiment. The image was taken by the www.nasa.gov/mission_pages/station/expeditions/expedition17/index.html Expedition 17 crew, and is provided by the Image Science & Analysis Laboratory, Johnson Space Center. The image in this article has been cropped and enhanced to improve contrast. Lens artifacts have been removed. The spaceflight.nasa.gov/home/index.html International Space Station Program supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC eol.jsc.nasa.gov/ Gateway to Astronaut Photography of Earth. Caption by Cynthia Evans, NASA-JSC.



Identifier ISS017-E-7156
Filename ISS017-E-7156_lrg.jpg
Creator NASA -- NASA Image Of The Day
Date ? 5/17/2008
Mediatype image
Rights Public Domain
Source http://earthobservatory.nasa.gov/IOTD/view.php?id=8800
Year ? 5/
Publicdate 2011-08-02 12:09:43
Addeddate 2011-08-02 12:09:43
Backup_location ia903702_7
Language English

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